A licensed esthetician, Rosen has performed thousands of hours of training and micropigmentation procedures in the 15 years she's been practicing.

“Experience is everything in this industry,” she said.

Something Cynthia Levine found out the hard way.

Levine has been microblading for 20 years and didn't think twice when a friend referred her to a new technician.

“Day two, there was some serious problems, some oozing and then when it finally dried the whole entire eyebrow basically peeled off,” she said.

To be licensed for microblading or micropigmentation, there's no minimum training or competency requirement. The cleanliness and hygiene of a brow studio are regulated by each county's individual health department. But when it comes to making sure brow artists know what they're doing, and who issues licenses, that varies by jurisdiction.

In fact, Georgia law states only a licensed physician can tattoo within an inch of an eye socket - otherwise it is a criminal offense.

That's why these procedures are officially called micropigmentation and microblading, and not tattoos.